It's such a powerful way to end the threat from an aggressive deck, leaving behind a relevant body to attack back with on the next turn
Its recommended to do this because its way harder to print on thick cardboard, and if you mix your printed proxies with real MTG cards, youll feel the difference

1 Wildcard of any rarity from among the following: A common (12.5%), uncommon (58.3%), rare (15.6%), or mythic rare (2.6%) from Tarkir: Dragonstorm 's main set A common (4.6%) or uncommon (3.8%) showcase draconic frame card A rare (0.2%) or mythic rare (0.1%) showcase draconic frame card A rare (1.3%) or mythic rare (0.2%) borderless clan card A rare (0.6%) from among the borderless Sagas, Sieges, and lands or a borderless mythic rare Elspeth, Storm Slayer (less than 0.1%) A rare (0.2%) or mythic rare (less than 0.1%) borderless reversible dragon 1 Rare or mythic rare card from among the following: A rare (75%) or mythic rare (12.5%) from Tarkir: Dragonstorm 's main set A rare (0.8%) or mythic rare (0.6%) showcase draconic frame card A rare (6.4%) or mythic rare (1.2%) borderless clan card A rare (2.7%) from among the borderless Sagas, Sieges, and lands or a borderless mythic rare Elspeth, Storm Slayer (0.1%) A rare (0.8%) or mythic rare (0.9%) borderless reversible dragon 1 Traditional foil card of any rarity from among the following: A common (56.5%), uncommon (32%), rare (6.4%), or mythic rare (1.1%) from Tarkir: Dragonstorm 's main set A common (1.6%), uncommon (1.4%), rare (less than 0.1%), or mythic rare (less than 0.1%) showcase draconic frame card A rare (0.5%) or mythic rare (0.1%) borderless clan card A rare (0.2%) from among the borderless Sagas, Sieges, and lands or a borderless mythic rare Elspeth, Storm Slayer (less than 0.1%) A rare (0.1%) or mythic rare (less than 0.1%) borderless reversible dragon 1 Land card from among the following: A non-foil default frame basic land (7.0%) or full-art dragon's presence basic land (3.5%) A traditional foil default frame basic land (1.7%) or full-art dragon's presence basic land (0.9%) Can be 1 of 10 common two-color lands in non-foil (70.0%) or traditional foil (17.4%) 1 Art card or non-foil double-sided token Please note that Play Boosters no longer contain ad cards

The more powerful a card is the more it will impact games as it is seeing more play than weaker cards
This enchantment also deals one damage to each of your opponents whenever you cast a spell from anywhere other than your hand
Is it just to hint at how green and black share deathtouch